User Guide

Managing the spam filtration server 35
Trusted status (please refer to section 2.3 on page 19 for details on
statuses).
You are not advised to disable spam recognition on the
common policy level. The feature may be useful during product
testing and in cases, when you need to filter spam for a few
user groups only.
• Detection Level defines how strictly the application approaches spam
recognition. It decides whether a message contains spam on the basis of
several signs detected in a message by the filtration module. This setting
determines how the filter will interpret these signs before it sets a
message status. Filtration policy provides for four detection levels:
Minimum, Standard, High, and Maximum. The higher is the level, the
less spam signs the application will need to recognize a message as
spam. When lower detection levels are used, the same set of signs will
only result in message recognition as a suspicious (the Probable Spam
status) or a message may be not recognized as spam altogether.
You are advised to use the Standard detection level.
Higher detection level can be used in cases, when Kaspersky Anti-Spam
does not detect spam messages or recognizes them as suspicious (with
the Probable Spam status). However, doing so will increase the
probability of false alarms, when a normal message may be recognized
as spam.
Lower detection level will decrease the probability of false alarms.
However, it may increase the chances of spam messages to bypass the
filter.
Besides the detection level, filtration result depends upon the
used methods of spam recognition. In case of false alarms you
should also pay attention to the methods employed for spam
recognition.
• Assignment of the 'Probable Spam' status – enables / disables
assignment of the Probable Spam status. If the parameter is set to
Disable, Kaspersky Anti-Spam will not assign the Probable Spam status
to e-mail messages.
• DNS & SPF Checks – checks of the sender's information in DNS and
using DNS-based services: DNSBL, SPF, etc.